Web Page 7 of 8
Planet Orbiting a Star

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Summary of Current Information
A. The Parent Star
B. The Exoplanet

VI. Calculating the Probability of Finding this Exoplanet

Even if a star has an orbiting planet, only in a very small percentage of cases will that planet make a transit across the disk of the star as seen from Earth's perspective.

The probability for a planet with a circular orbit is given by:

  probability (%) = (Rstar / a) * 100%
  % = (
(Press the calculate button to estimate the mass of the exoplanet.)

where


Press the button for a summary of your analysis.


Explanations

Notes on Computing the Probability of Finding the Exoplanet

A complete derivation of the probability of finding a given exoplanet assuming a uniform random distribution of the angle that the plane of its orbit makes with respect to our line of sight to the star is gven by the formula above.

Hints (Reminders)

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Simulation Authors: Richard L. Bowman (Bridgewater College) and David Koch (Kepler Mission)

Maintained by: Richard L. Bowman rbowman@bridgewater.edu (2002-04; last updated: 19-Apr-04)